Palkalocka

I was trying to explain the marbles in a blender to my Mazda service tech when he asked my why I would rev it up that high anyway. So I said “A redline a day keeps the carbon away”. He looked at me funny so I said the periodic high RPM helps clear out the carbon build up. He still was giving me funny looks and asked me where Mazda said that periodic high RPM would benefit the engine. I tried looking through the owners manual a little but couldn’t find anything. Does any one know of a Mazda document that says something like this?

dshiznit1489

i met this mazda tech today, hes a dick who thinks he's the ****. he should die in a fire.

Old Rotor

Are you having MIAC (Marbles In A Can)problem with reg-87 or prem-91? Here is what I did to fix mine, it only took one minute to do!

https://www.rx8club.com/rx-8-discussion-3/no-more-detonation-%2Amiac%2A-121249/

mdr

There is nothing in the manual that says red line it . Just the opposite.

It says in the manual that running the engine in the red zone can cause severe engine damage and should not be done.

However it does say you should not drive it at high RPM's above 7000 in the first 1000. So I personally take that to mean it is OK to run it up there but shift before red line. After 7000 you are opening the secondary ports which is what you want to do anyway.

Startl_Respons

Mr. Mazda, the founding father of Mazda, told me that once at a party. Next time I see him, I'll be sure to tape record it and then I'll post it here just for you, ok?

Haze

There is no official advice from Mazda that I know of saying that a red-line a day will keep my mechanic away, however, there is official advice from my dentist saying that it will help my smile significantly!

The manual says not to keep the car at red-line for a significant period of time as that can cause engine damage. Red-lining through up-shifts will not hurt the car at all.

Personally, I believe that red-lining helps blow out carbon, and taking it for a long highway run helps too, but these are personal beliefs.

motorups

I thought the rx8 has a rev limiter that prevents damage to the engine or maybe I'm confused and what we have is a 'bell' that chims to just let you know you are red lining the car. If we do have a rev limiter then once it hits red line the gas flow would be reduced until the engine is below red line.

On my automatic (07) I did a rough check of rpm and speed and here is what I came up with:
1st gear
4k is 19 mph
5k is 25 mph
6k is 30 mph

2nd gear
4k is 33 mph
5k is 42 mph
6k is 60 mph

3rd gear
4k is 47 mph
5k is 60 mph

For my type of driving in this car I find I would change gears once I hit around 4k in 2nd gear then I could stay in 3rd up to maybe 5k but probably go into 4th before that. I find that 3k to 4k works fine in that I have some power starting at 3k. I'm sure many others want to keep it at 4k or 5k at the min. Me, it just does not seem like I have to be turning that may revs in order to be happy with the car, how it handles, or the amount of 'on tap' power at any given moment (though indeed probably 4k is the min to have any sense of real power on tap I believe).

With just over 1,000 miles on it maybe my thinking will change in time. Had a few friends ride the mx5 07 (before I traded it in on the rx8 and they were hitting and passing 5k a lot). Guess it just depends on the driver.

CyberPitz

The redline buzzer kicks in...I don't think there is much of a limiter other than 10k or such. *still past redline*

Socket7

Exactly how high did you tell the tech you rev it?

This is the closest thing to saying "redline the car" that could find among the stuff that i got when i bought my car.

Groundrush

Meh...

At my nearby dealership, a smaller one here locally, one of the service writers told me that the RX-8s that have the greatest engine troubles are those who's owners indicate they "baby it". He was quite clear in telling me that to keep the engine healthy, the driver needs to "get the RPMs up there". I informed him that I got my RPMs up once a day or so, he replied "that's fine". I've also had them tell me that upon changing my plugs, they looked great, and they commented "it looks like you keep the RPMs up...that's good."

Also...my 8 came with a "Drivers Guide" inside the Owners Manual pack that states the following:

Buzz it.
The RENESIS rotary engine generates linear power and torque that truly engages you at higher rpm ranges. Models with the 6-speed manual transmission redline at 9,000 rpm, while Sport AT models redline at 7,500 rpm. While the RENESIS rotary engine performs best in upper rpm ranges, an engine overrev warning buzzer will sound when the tachometer needle enters the striped zone.

I don't now about you, but giving someone information that their engine performs best at high RPMs and then telling them to "Buzz it" seems to indicate that Mazda feels high RPMs are just fine. I think the guy you spoke with needs a clue.

Easy_E1

iTrader: (2)

Hightshoe

Full cutoff is at 9500 rpm. If you hit it you'll know.

New Yorker

My 8 came with a little Mazda pamphlet called "Driving Tips," or something like that—it's the one with the pictures of how the Renesis works—and, if I recall correctly, in there it says something like "the Renesis likes to be revved." (Those aren't the exact words, but that was the gist of it.)

Palkalocka

I just said that when I go above 7000rpms I hear the marbles sound.

Socket7

If he looks at you funny because you hit 7K he's an idiot. 7K is within the power band of the motor. Why wouldn't you rev it that high?

nevijeff

Was told by the mechanic at my dealership "Don't baby it", "Drive it like you stole it", the real answer probably is somewhere in the middle. I tend to rev it high until I get on the highway and then kick in the cruise control to try and maintain some resemblance of sane gas milage - Jeff

EdwardsB

here is a chart of our port/intake valves and when they open relative to engine speed...they are not all open until ~7250...just like socket said its all within the power band. So its not that you need to redline, you just need to put on the power to open all the valves/ports up so they don't get stuck.

mdr

If you told him 7000 rpm and he asked why you would rev it that high I would go the service manager and ask if they have another mechanic that understands what a rotary engine is.

delhi

The tech who is used to fixing mazda3 and mazda6 will have no idea what is a Renesis let alone the high rev-rotary. Their idea of redline is 6000rpm.

Razz1

The mechanic knows nothing about rotories.

Go somewhere else.

nycgps

iTrader: (1)

IF I were you, after what this *dude* saids, I will just tell him to stay away from my car and drive my car away from that dealership ASAP.

Oh while u're at it, be sure to tell the service manager that he has a moron working for him.

Mazda never directly said anything about *Redline once a day keeps the carbon away* but in their little packet and stuff. Revving is recommended.

Plus, Who actually listens to Mazda 100% ? Even dealership never listens to Mazda.

RotaryP7

I guess you tend to lure around this forum a bit too much.. You start to believe things.. Rev is good, 8 is a slow car, 8 looks good, MT beats AT in every aspect, bad mpg, 8 looks good once again, slow, rev good, mpg, MT, looks good, cake, car, 8, slow, fast, looks, rev, mpgomg, wtf, wow, help, I, can't, stop, this,..

ok, I'm done.
But remember, don't trust anyone.. Except the forum members.

thirdkong

I bought this car because of the redline.

N rider89

the cake is a lie................

Tigerfootball

you forgot pie.......